/Engine/Plugins/Protocols/MQTT/Source/MQTTCore/Public/IMQTTCoreModule.h
Creates an MQTT client from a URL. An existing client is returned for a matching URL. bForceNew = recreate if existing
[TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [IMQTTClient](API\Plugins\MQTTCore\IMQTTClient), ESPMode::ThreadSafe > GetOrCreateClient ( const [FMQTTURL](API\Plugins\MQTTCore\FMQTTURL) & InURL, bool bForceNew )